JSFiddle - React, Tailwind, and code Playground

HTML

<script src="https://code.jquery.com/jquery-2.2.4.min.js"></script>
<script src="//cdn.datatables.net/1.10.12/js/jquery.dataTables.min.js"></script>
<link rel="stylesheet" href="//cdn.datatables.net/1.10.12/css/jquery.dataTables.min.css">
<table id="example" class="display" cellspacing="0" width="100%">
</table>

JavaScript

// check if an element exists in array using a comparer function
// comparer : function(currentElement)
Array.prototype.inArray = function(comparer) { 
    for(var i=0; i < this.length; i++) { 
        if(comparer(this[i])) return true; 
    }
    return false; 
}; 

// adds an element to the array if it does not already exist using a comparer 
// function
Array.prototype.pushIfNotExist = function(element, comparer) { 
    if (!this.inArray(comparer)) {
        this.push(element);
    }
}; 
  
  var dataSet = [{  
   "Exception":null,
   "ScorecardList":[  
      {  
		 "Metrics":"Sev 1",
         "ADAM":100,
		 "eTenet":40,
		 "BPM":10,
		 "DMC":0,
         "EID":50                               
      },
      {  
         "Metrics":"Sev 2",
         "ADAM":80,
		 "eTenet":100,
		 "BPM":0,
		 "DMC":20,
         "EID":50
      },
      {  
         "Metrics":"Sev 3",
         "ADAM":80,
		 "eTenet":100,
		 "BPM":100,
		 "DMC":50,
         "EID":50
      },
      {  
         "Metrics":"Sev 4",
         "ADAM":80,
		 "eTenet":0,
		 "BPM":0,
		 "DMC":0,
         "EID":50
      },
      {  
         "Metrics":"Sev 5",
         "ADAM":80,
		 "eTenet":0,
		 "BPM":60,
		 "DMC":80,
         "EID":50
      }
   ]
}];
	  
	var my_columns = [];
	alert(dataSet[0].ScorecardList);
  
	$.each( dataSet[0].ScorecardList[0], function( key, value ) {
			var my_item = {};
			my_item.data = key;
			my_item.title = key;
      alert(key + " " + value);
      
			//my_columns.push(my_item);
      my_columns.pushIfNotExist(my_item, function(e) { 
        return e.data === my_item.data && e.title === my_item.title; 
    });
	});
  console.log(my_columns);
  console.log(dataSet[0].ScorecardList);
	
	$(document).ready(function() {
	  $('#example').DataTable({
	    data: dataSet[0].ScorecardList,
	    "columns": my_columns
	  });
	});